Pessimism leads to weakness, optimism to power.

• It is well for the world that in most of us, by the age of thirty, the character has set like plaster, and will never soften again.
• The art of being wise is the art of knowing what to overlook.
• It is our attitude at the beginning of a difficult task which, more than anything else, will affect its successful outcome.
• Whenever you're in conflict with someone, there is one factor that can make the difference between damaging your relationship and deepening it. That factor is attitude.
• Success or failure depends more upon attitude than upon capacity successful men act as though they have accomplished or are enjoying something. Soon it becomes a reality. Act, look, feel successful, conduct yourself accordingly, and you will be amazed at the positive results.
• There must be something solemn, serious, and tender about any attitude which we denominate religious. If glad, it must not grin or snicker if sad, it must not scream or curse.
• To study the abnormal is the best way of understanding the normal.
• The best argument I know for an immortal life is the existence of a man who deserves one.
• In business for yourself, not by yourself.
• The god whom science recognizes must be a God of universal laws exclusively, a God who does a wholesale, not a retail business. He cannot accommodate his processes to the convenience of individuals.